package com.neutech.filter;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(urlPatterns = "/*")
public class CommonSettingsFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        // 设置请求对象编码
        request.setCharacterEncoding("utf-8");
        // 设置跨域
        response.setHeader("Access-Control-Allow-Origin", "http://localhost:8888");
        response.setHeader("Access-Control-Allow-Headers", "Content-Type, Content-Length, Authorization, Accept, X-Requested-With");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        // 设置响应格式
        response.setContentType("application/json;charset=utf-8");
        // 放行
        filterChain.doFilter(servletRequest, servletResponse);
    }
}
